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<p>Additive manufacturing (AM) 17-6 precipitation-hardening stainless steel fabricated by laser powder bed fusion (LPBF) was selected as the raw material. The experimental results showed that both the as-printed and heat-treated samples consist of a martensitic matrix, with traces of retained austenite. The mechanical properties of different heat-treated samples indicate that one-step aging or double-aging precipitation treatment on AM 17-6 had positive effects on tensile properties, hardness and impact fracture toughness. Additionally, the tensile fracture surface analysis, compared with the stress-strain curve, confirmed the excellent ductility and toughness of AM 17-6. Finally, the relevant parameters were applied to the printing of the sliding specimen. The product was free of defects, and the tolerance dimension was within ± 0.1&#xa0;mm. In the future, the sliding specimen will undergo an optimized heat treatment, followed by assembly and durability estimation.</p>

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Additively Manufactured Precipitation-Hardening Stainless Steel Application Research: Microstructure, Tensile Properties and Impact Fracture

  • 期刊论文

  • 发表日期：

    2025年7月1日

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  • Zhao-Sheng Wu,
  • Bo-Ding Wu,
  • Fei-Yi Hung

摘要

Additive manufacturing (AM) 17-6 precipitation-hardening stainless steel fabricated by laser powder bed fusion (LPBF) was selected as the raw material. The experimental results showed that both the as-printed and heat-treated samples consist of a martensitic matrix, with traces of retained austenite. The mechanical properties of different heat-treated samples indicate that one-step aging or double-aging precipitation treatment on AM 17-6 had positive effects on tensile properties, hardness and impact fracture toughness. Additionally, the tensile fracture surface analysis, compared with the stress-strain curve, confirmed the excellent ductility and toughness of AM 17-6. Finally, the relevant parameters were applied to the printing of the sliding specimen. The product was free of defects, and the tolerance dimension was within ± 0.1 mm. In the future, the sliding specimen will undergo an optimized heat treatment, followed by assembly and durability estimation.